Apparatus for separating grain or seed or the like



p 1931- J. N: MITCHELL I 1,824,915

APPARATUS FOR SEPARATING GRAIN OR SEED OR THE LIKE Filed Dec. 19, 1927 2 Sheets-Sheet l Sept. 29, 1931. J. N. MITCHELL 1,824,915

APPARATUS FOR SEPARATING GRAIN OR SEED OR THE LIKE I Filed Dec. 19, 1927' 2 Sheets-Sheet 2 clined rear perforated .Walls 4, the pan havconjointly with the rotatable friction guide .30 1n bearings 12 onthe framing l, a Said ulley to enable power to be communi- Patented Sept. 29, 1931 1 UNITED STATES PATENT orrlcs JOHN NANKIVELL Madame, or srnA'rnFInLnnEAR AUSTR L A I APPARATUS roe snrAaArme' GRAIN on snnn on THE LIKE:

Application filed neeem'ber 19,1927, Serial No.

This invention relates to'apparatus usable for the separation of grain, seed, or the like from the bulk material and; foreign matters which are mixed therewith.

The object of the invention is to provide separating apparatus for the purposemen tioned which is of simple and cheap construction; easily and cheaply operatable; and effective in obtaining maximum results in the separation of the desired materials in minimum time.

Referring to the accompanying drawings in which the invention is illustrated, Fig 1 is a perspective view of the apparatus; Fig.

2 cross-sectional view; and Fig. 3 front elevation ofseparator pan. A

A framing 1 of suitable type is provided for the apparatus. Within such framing is angularly carried a separator pan 2 pref erably with inclined forward walls8 and in ing a perforated bottom 5. Suchpan 2ris furnished with a rim 6 audit isrotatably supported'and positioned in the framing 1 on thegrooved rotatable friction rollers 7 roller 8.

Said rollers 7 are fixed to shafts 9 which are journalled in bearings 10 on the framing 1. A drive shaft 11 is also journalled shaft 11 has fixed thereto bevel wheels 13 which are adapted to mesh with bevelwheels 14 on the shafts 9 whereby the latter shafts .are rotatable; On the shaft llis a drive cated as desired to the shaft 11., v

Associated withtheframingl is a chute 16 to which material to be treated in the apparatus may be fed; the open exit mouth of pan 2; -The latteris situated above a delivery chute 17 supported on the framing 1 and such chute 17 is adapted to receive dust from the material undergoing treatment and todeliver same to a receptacle or otherwise exterior of the framing 1. Said-' chute 16 may have associated therewith adjustable control means 19 for regulating feed of material to the pan 2. v

241,175, and in Australia December 23, 192 6.

SYDNEY, new sotrrnwAmzs,

Supported on the framing 1 is a chute 18 disposed in relation to the open mouth of the pan 2, whereby any light or coarse reject substances of the material undergoing treatment, during the rotation of said pan, will pass into the chute 18 and be deliveredthere from exteriorly of the framing 1 either into a receptacle or otherwise. Heavy reject material which may collect in the pan 2 can be removed therefrom by hand. 1

To enable the good grain or seed or the like to be collected from the treated material achute is provided; saidchute is preferably made'in two sections 20 and 21 which are ade justable in relation to each otherywhereby depending on the rotation of the pan 2, the section 20 may be raised or lowered in relation to the open mouth of the pan 2 tocatch the separated material as desired. Such chute 20-21 is supportable on the framing 1 and separated material passing thereover .maybe led therefrom to a suitable receptatheflperforations in the walls 4 and perforated bottom 5'of the pan into the hopper 17, While light and coarse reject material will flow over the open mouth of the pan into the chute 18. I i Theangularity of the walls 3 and 4 of the pan 2 is such that in the rotationof the said pan .one portion of the walls thereof will be approximately horizontal while the adjoining portion of the walls 3 of the pan 2 will be angular-1y disposed thereto whereby motion will be given to the material in the pan to convey light and coarse reject material to the chute 18 and to simultaneously convey good grain to be recovered to the chute 20 21.t hrough which such grain is ,dis-

chargeable from the apparatus.

The angular disposition of the walls of I the pan gives a whirling or spinning motion to the material under treatment, and the light and coarse material, such as. chaff and straw (when wheat is treated) rises to centrifugal action (at the correct speed) and falls into chute 20 and from thence to the chute portion 21 and is thus deliverable exteriorly of the apparatus. The heavier or best grain gathers on the bottom of the pan 5 and in travelling across falls into chute 23. Fine dust and sand pass through the perforations and heavy material such as stones and metal remain in the horizontal portion of the pan.

In connection with the foregoing it is to be noted that the speed of rotation de pends on the diameter of the pan also the specific gravity of the material treated; in general use the periphery speed would be of the order of 300 feet per minute. The chute 20 is adjustable during operation, and the position is varied in accordance with the amount'of material it is desired to remove at this point. V

In operation, assuming that the pan 2 is rotating, material to be'separated may be fed to such pan through the chute 16. As the pan 2 is rotating dust passes from the treated material through the perforations in the walls 4 and perforated bottom 5 of the pan 2 into the chute 17, while light or coarse reject material flows. over the open front edge of the pan 2 into the chute 18. Any extra coarse reject material remaining in the pan 2 may be subsequently removed. In the rotation of the pan 2, depending on its velocity and the disposition of the open mouth of the section 20 of the chute 2021 in relation to the open mouth of the pan 2,

good grain or the like to be recovered passes into the section 20 and is thus delivered from the pan 2. Feed of material fromthe V chute 16 to the pan 2 is regulatable through the control means 19.

What I claim as my invention and desire to secure by Letters Patent is j 1. In a grain or like separator, a pan provided with an open mouth the walls of which mouth are reversely angularly inclined to the walls of the rear of the pan which are perforated, a frame on which the said pan is adapted to be disposed angularly and to be rotatable thereon, whereby during the rotation of the said pan light and coarse substances of the material fed to said pan will be discharged from the mouth of the pan and delivered from the apparatus, dust from said material will pass through the perforated walls of the pan, and means associated with the pan for receiving and discharging good grain from the apparatus.

2. A grain or like separator according to claim 1, in which the constructionof the pan. and the disposition thereof on the framing are such that material to be treated and fed to the pan during the rotation thereofis separated in the pan in such manner that good grain to be recovered is carried in an upward direction in the pan to be automatically discharged therefrom, while the light and coarse substances of the treated material are carried to the mouth of the pan to be automatically discharged therefrom.

8. A grain or like separator according to claim 1, in which the construction of the pan and the disposition thereof on the framing are such that as the pan rotates on the framing part of its rear perforated portion assumes an approximately horizontal plane while the adjoining part of its mouth portion is in angular relation theretoand material fed to the pan to be treated therein is separated by dust passing from such material through the horizontally disposed part of the pan, good grain is carried in an upwardly directionin the pan and discharged therefrom, and light and coarse 'material is carried to the open -mouth of the pan'and discharged therefrom.

4. In and for a grain or like separator, a pan having an open mouth and a perforated bottom, the side walls of the said pan being constructed so that the forward portion thereof is reversely inclined to the rearward portion thereof, whereby the open mouth of the pan will be of lesser diameter than the medial portion of the pan, the said rearward portion being perforated.

v 5. A grain or like separator comprising a framing, a pan having an open mouth and a perforated bottom rotatably and angularly mounted in said framing said pan having reversely inclined side walls so that the open mouth of the pan will be'of lesser diameter than the medial portion of the pan, a feed chute for material to be treated and leading to the said pan, means on the framing in association with said pan to receive dust from the latter, means in communication with the open mouth of the pan and adapted to collect from the pan coarse and light rejected material, and means associated with the pan whereby able from the pan.

6. A grain or like separator comprising a framing, a rearwardly perforated pan with reversely inclined side walls one portion of which leads to an open mouth which is of lesser diameter than the medial separated material to be collected is feed- I portion of said walls, means for rotatably supporting said pan in angular position on said framing, a feed chute for material to be treated and capable of discharging such material into said pan, a hopper below the perforated pan to receive dust from material undergoing treatment in the pan, a

chute in communication with the open mouth of the pan and adapted to collect from the pan coarse and light rejected material, and an adjustable chute in communication with the open mouth of the pan and adapted to serve as a collector and discharger for good grain from the pan.

7. A grain or like separator claim 1, in which the framing supports a rotatable shaft, the latter having means associated therewith whereby shafts carrying friction rollers contacting with the pan are adapted to be rotated and the pan thereby rotated.

8. A claim 1, in which the bottom of the pan is provided with an outlet for grain.

In testimony whereof I aflix my signature.

JOHN NANKIVELL MITCHELL.

according to grain or like separator according to separated 

